CN203665367U - Clamp - Google Patents

Abstract

The utility model belongs to the technical field of tool clamps and provides a clamp. The clamp comprises a base body and a clamping component detachably and fixedly connected to the base body. The clamping component at least comprises a first clamping portion and a second clamping portion which are oppositely arranged. A driving component used for driving the first clamping portion and the second clamping portion to move close is arranged on the base body. The driving component comprises a lateral expanding block connected to the base body in a sliding or rotating mode and used for driving the first clamping portion or/and the second clamping portion to move close and further comprises a power component used for driving the lateral expanding block. According to the clamp, the clamping component is detachably connected to the base body and driven by the driving component so that the rapid switch can be achieved by the clamping component; the generality of the clamp is good, a large amount of preparation work before wire replacement of a product is omitted, the production efficiency is improved, and cost is reduced.

Description

fixture

technical field

The utility model belongs to the technical field of fixtures, in particular to a fixture with good versatility.

Background technique

In the processing of traditional mechanical parts, in order to improve production efficiency and ensure product quality, corresponding fixtures are designed. However, for multi-variety and small-batch processing, it is necessary to design multiple sets of fixtures, which is costly and has a large number of fixtures, which is not easy to manage.

The clamping parts of the fixtures in the prior art are not easy to replace, and only a single workpiece can be clamped. When processing small batches of multiple types of workpieces, it is inconvenient to replace the fixtures. Different fixtures need to be designed and manufactured for different workpieces, and the fixtures are universal. Poor sex.

Utility model content

The purpose of the utility model is to overcome the disadvantages of the above-mentioned prior art, and provide a clamp whose clamping parts are easy to replace, and the clamp has good versatility.

The utility model is realized in the following way: a clamp includes a base body and a clamping part that is detachably fixedly connected to the base body, and the clamping part at least includes a first clamping part and a second clamping part set opposite to each other , the base body is provided with a driving part for driving the first clamping part and the second clamping part close together; The holding part or/and the lateral expansion block close to the second clamping part, and the driving part further includes a power part for driving the lateral expansion block.

Optionally, the lateral expansion block is slidably connected to the base body, and the sliding direction of the lateral expansion block is perpendicular to the direction in which the first clamping part and the second clamping part approach each other. The side of the expansion block facing the clamping component or/and the side of the clamping component facing the lateral expansion block is provided with a slope.

Optionally, the clamping components are arranged in pairs at intervals, and the lateral expansion block is arranged between the two clamping components arranged at intervals.

Optionally, there are at least two pairs of clamping components, and a set of lateral expansion blocks is provided between each pair of clamping components.

Optionally, the first clamping part and the second clamping part are connected through an elastic arm, or an elastic member is provided between the first clamping part and the second clamping part.

Optionally, the elastic arm includes a bottom transverse arm and a first longitudinal arm and a second longitudinal arm disposed opposite to each other, the upper end of the first longitudinal arm is connected to the first clamping portion, and the first longitudinal arm The lower end of the second longitudinal arm is connected to one end of the bottom transverse arm, the upper end of the second longitudinal arm is connected to the second clamping portion, and the lower end of the second longitudinal arm is connected to the other end of the bottom transverse arm.

Optionally, the opposite end surfaces of the first clamping part and the two clamping parts are provided with clamping grooves, and the clamping grooves are arc-shaped or angular.

Optionally, the base body is provided with precise positioning holes and/or fixing locking holes.

Optionally, the base body is connected with a ball lock component, and the ball lock component includes a lock tube with a through hole on the side wall, a threaded connection piece threaded on the lock tube, and a drive at the lower end of the threaded connection piece. A steel ball, a locking steel ball driven by the driving steel ball and protruding from the through hole, the locking steel ball is disposed at the through hole, and at least two of the through hole and the locking steel ball are provided.

Optionally, a positioning groove is provided on the base body, and one side of the first clamping part or the second clamping part is in contact with the side wall of the positioning groove, and is connected to the on the substrate.

Optionally, a detachable and replaceable pad is provided between the lateral expansion block and the clamping component.

Optionally, the power component is an air cylinder or a hydraulic cylinder, and the power component is built in the base body.

The fixture provided by the utility model, its clamping part is detachably connected to the base and driven by the driving part, the clamping part can be quickly switched, the clamp has good versatility, and saves a lot of preparation work before changing the product line, which is beneficial Improve production efficiency and reduce costs.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the accompanying drawings that need to be used in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

Fig. 1 is the assembly perspective schematic diagram of the clamp provided by the embodiment of the present invention;

Fig. 2 is another assembly perspective schematic diagram of the clamp provided by the embodiment of the present invention;

Fig. 3 is a schematic cross-sectional view of the clamp provided by the embodiment of the present invention;

Fig. 4 is a schematic top view of the clamp provided by the embodiment of the present invention;

Fig. 5 is another schematic cross-sectional view of the clamp provided by the embodiment of the present invention;

Fig. 6 is a three-dimensional schematic diagram of a clamping part with a semicircular clamping groove in the clamp provided by the embodiment of the present invention;

Fig. 7 is a three-dimensional schematic diagram of a clamping part with an angular clamping groove in the clamp provided by the embodiment of the present invention;

Fig. 8 is a three-dimensional schematic view of the clamping part in the clamp provided by the embodiment of the present invention with the clamping groove in the shape of a through groove.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or there may be an intervening element at the same time. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

It should also be noted that the orientation terms such as left, right, up, and down in this embodiment are only relative concepts or refer to the normal use state of the product, and should not be regarded as limiting.

As shown in Figures 1 to 4, a fixture provided by the embodiment of the present invention includes a base 1 and a detachable clamping part 2 fixedly connected to the base 1. The base 1 can be a bottom plate or a mounting frame, etc., clamping Part 2 is used to clamp the workpiece, and the clamping part 2 can be connected to the base 1 through pins, screws, chucks, buckles, lock slots (such as T-shaped slots or dovetail slots), etc., so as to facilitate quick disassembly. The clamping part 2 includes a first clamping part 21 and a second clamping part 22 disposed opposite to each other, and the first clamping part 21 and the second clamping part 22 can approach each other to clamp the workpiece. In this embodiment, the clamping part 2 is a two-petal type, and the first clamping part 21 and the second clamping part 22 can be arranged symmetrically. Certainly, the clamping part 2 may also be of a three-lobe type or a four-lobe type. When there are three or more clamping parts, each clamping part can move toward the center to clamp the workpiece.

As shown in FIGS. 1 to 4 , the base 1 is also provided with a driving part 3 for driving the first clamping part 21 and the second clamping part 22 to move closer together. The driving part 3 is connected to the base 1 by sliding or rotating The lateral expansion block 31 is used to drive the first clamping part 21 or/and the second clamping part 22 to approach laterally. In this embodiment, the lateral expansion block 31 is slidably connected to the base body 1, and the sliding direction of the lateral expansion block 31 is perpendicular to the direction in which the first clamping part 21 and the second clamping part 22 approach each other. The power part 32 used to drive the lateral expansion block 31 to slide. In this embodiment, the lateral expansion block 31 is slidably arranged in the longitudinal direction (Y1-Y2 direction in the figure), and the first clamping part 21 and the second clamping part 22 can move closer together in the horizontal direction (X1-X2 direction in Figure 5). . When the lateral expansion block 31 slides longitudinally downward, the lateral expansion block 31 can drive the first clamping part 21 and the second clamping part 22 to close together to clamp the workpiece. Of course, it can also be set so that when the lateral expansion block 31 slides vertically upward, the lateral expansion block 31 can drive the first clamping part 21 and the second clamping part 22 to approach each other to clamp the workpiece, only need to change the lateral expansion The inclination direction of the slope on the side of the block 31 is sufficient. Alternatively, the lateral expansion block 31 can also be rotatably connected to the base body 1, and the rotational movement of the lateral expansion block 31 can be converted into linear motion of the first clamping part 21 and the second clamping part 22 through a cam or eccentric mechanism. It can be understood that the longitudinal direction, transverse direction, etc. in this embodiment are only relative concepts or refer to the normal use state of the clamp, and should not be regarded as limiting. Moreover, it can be understood that terms such as vertical, horizontal, and longitudinal in this embodiment are only used to describe relative relationships, and are not strictly geometrically limited in consideration of jig processing, assembly errors, and the like. Multiple clamping parts 2 can be prepared, and different clamping grooves can be provided on each clamping part 2, or the gap between the first clamping part 21 and the second clamping part 22 in each clamping part 2 can be different . By setting the driving part 3 for slidingly driving the clamping part 2, the clamping part 2 is easy to replace, realizing the functions of quick installation, positioning and locking, which saves a lot of preparation work before changing the product line, which is conducive to improving production efficiency and reduce costs.

Specifically, as shown in Figures 1 to 5, the side of the lateral expansion block 31 facing the clamping member 2 is set as an inclined plane or an arc surface, so that when the lateral expansion block 31 slides longitudinally, the first clamp can be directly driven. The holding part 21 and the second holding part 22 are close to each other. Of course, it is also possible to set the side of the clamping part 2 facing the lateral expansion block 31 as a slope or an arc surface, or to set the side of the lateral expansion block 31 facing the clamping part 2 and the corresponding side of the clamping part 2 The sides are all set as bevels or arcs. The lateral expansion block 31 can be in a suitable shape such as an inverted trapezoid or an isosceles triangle.

Specifically, as shown in FIGS. 1 to 5 , the clamping components 2 are arranged in pairs at intervals, and the lateral expansion block 31 is arranged between the two clamping components 2 arranged at intervals. The lateral expansion block 31 can independently drive the first clamping part 21 or the second clamping part 22 . The same lateral expansion block 31 can simultaneously drive the clamping components 2 on both sides thereof, the structure is compact, and more clamping components 2 can be arranged on the base body 1 of the same size. Of course, lateral expansion blocks can also be provided on both sides of the clamping part 2, and the two lateral expansion blocks can drive the same clamping part 2 at the same time, which also belongs to the protection scope of the present invention.

Specifically, as shown in Figures 1 to 5, there are at least two pairs of clamping components 2, and a set of lateral expansion blocks 31 are arranged between each pair of clamping components 2, and each lateral expansion block 31 is connected to With the power part 32 , each pair of clamping parts 2 can be individually controlled by the corresponding lateral expansion block 31 . Or, it is also possible to use one lateral expansion block to drive two or more pairs of clamping parts 2, or, or if the clamping part 2 is larger, two or more lateral expansion blocks can also be used to drive the same A clamping part 2 also belongs to the protection scope of the present invention.

Specifically, as shown in FIGS. 1 to 5 , the base body 1 is provided with precise positioning holes 101 and/or fixing locking holes 102 . The base body 1 can be fixed on the worktable by passing through the precise positioning hole 101 or/and the fixing locking hole 102 through a guide post, a positioning pin, a bolt, and the like.

In this implementation, as shown in FIGS. 1 to 5 , the base body 1 is connected with a ball lock component 4 , and the ball lock component 4 can pass through the precise positioning hole 101 or/and the fixed locking hole 102 . The ball lock part 4 comprises a lock pipe 41 whose side wall is provided with a through hole 401, a threaded connector 42 threadedly connected to the lock pipe 41, a driving steel ball 43 positioned at the lower end of the threaded connector 42, driven by the driving steel ball 43 and protruding through the The locking steel ball 44 of the hole 401, the locking steel ball 44 is arranged at the through hole 401, the through hole 401 can be provided with at least two and is evenly distributed along the circumferential direction of the locking tube 41, and each through hole 401 is provided with at least one locking steel ball 44, the through hole 401 and locking steel balls 44 are respectively provided with at least two and are evenly distributed along the circumferential direction of the locking tube 41, and the positioning accuracy is high. In this embodiment, there are three or four through holes 401 and locking steel balls 44 and they are evenly distributed along the circumferential direction of the locking tube 41 . The threaded connector 42 can be a screw. When the threaded connector 42 is tightened downward, its lower end pushes the driving steel ball 43, so that the driving steel ball 43 moves downward, so that the locking steel ball 44 arranged around the driving steel ball 43 moves outward, and then realizes the functions of positioning and locking. The precision can reach 0.015mm. In a specific application, for an ultra-high-precision workpiece, the base 1 on the fixture can optionally be provided with more than two positioning holes.

Specifically, as shown in FIGS. 1 to 5 , a positioning groove may be provided on the base 1, and one side of the first clamping portion 21 or the second clamping portion 22 may be attached to the side wall of the positioning groove, and through the positioning The locking element is fixed on the base body 1 to facilitate the assembly of the clamping part 2 . The base body 1 can also be provided with a limiting block 6 for positioning on the clamping part 2 . It is also possible to set an installation groove with uniform specifications on the base body 1, and the clamping part 2 can be directly placed in the installation groove, which is more convenient for the replacement of the clamping part.

Specifically, as shown in Figures 1 to 5, a detachable and replaceable spacer 5 is provided between the lateral expansion block 31 and the clamping part 2. By replacing different spacers 5, more clamps of different sizes can be matched. The holding part 2 further improves the versatility of the fixture. The spacer 5 can be in the shape of a rectangular block or the like. The lateral expansion block 31 can directly act on the spacer 5 or the clamping part, or indirectly drive the clamping part 2 through an adapter sleeve.

Specifically, as shown in FIGS. 1 to 5 , the power component 32 may be an air cylinder or a hydraulic cylinder or the like. The power component 32 can be built into the base body 1 . In this embodiment, the air cylinder can be an ultra-thin air cylinder, and the air cylinder and the air pipe connected to the air cylinder are also built in the base body 1, which has a compact structure, and the built-in pneumatic components can reduce unstable safety factors in processing and save fixture space. Of course, the driving part can also be a linear motor, or drive the lateral expansion block 31 through a screw nut or a cam mechanism, which also belongs to the protection scope of the utility model. The lateral expansion block 31 can be connected to the telescopic shaft of the air cylinder through a connecting piece 33 . The connecting piece 33 can be a screw or the like.

Specifically, as shown in FIGS. 6-8 , the first clamping part 21 and the second clamping part 22 are connected by an elastic arm 23, and the elastic arm 23 can be in the shape of a frame with an upper end open or an arc shape with an upper end open ( For example, a semicircle), etc., the first clamping portion 21 and the second clamping portion 22 can be respectively fixedly connected or integrally formed at both ends of the elastic arm 23 .

Or, as an alternative to the elastic arm 23, an elastic member is provided between the first clamping portion 21 and the second clamping portion 22, and the first clamping portion 21 and/or the second clamping portion 22 are slidably connected to the base 1. The elastic member can be a spring or the like, one end of the spring abuts against the first clamping portion 21 , and the other end of the spring abuts against the second clamping portion 22 .

As shown in Figures 6 to 8, in this embodiment, the elastic arm 23 is used to connect the first clamping part 21 and the second clamping part 22, the first clamping part 21 and the second clamping part 22, the elastic arm 23 It can be made of high-manganese steel and other metal materials with good elasticity, and can be heat-treated to further improve the elastic performance of the elastic arm 23 . The elastic arm 23 includes a bottom transverse arm 233 and a first longitudinal arm 231 and a second longitudinal arm 232 facing each other. The first longitudinal arm 231 and the second longitudinal arm 232 can be disposed longitudinally or obliquely. The upper end of the first longitudinal arm 231 is connected to the first clamping portion 21, the lower end of the first longitudinal arm 231 is connected to one end of the bottom transverse arm 233, the upper end of the second longitudinal arm 232 is connected to the second clamping portion 22, and the second longitudinal arm 232 is connected to the second clamping portion 22. The lower end of the longitudinal arm 232 is connected to the other end of the bottom transverse arm 233 . The elastic arm 23 and the first clamping portion 21 and the second clamping portion 22 can be integrally formed or connected by welding or the like. Of course, the structure and shape of the elastic arm 23 can also be set to other suitable structures and shapes.

Specifically, as shown in FIGS. 6 to 8 , opposite ends of the first clamping portion 21 and the second clamping portion 22 may be provided with a clamping groove 201 for clamping the workpiece. The clamping groove 201 can be in a suitable shape such as an arc or an angle. Of course, the clamping groove 201 may not be provided or the clamping groove 201 may be set as an open groove. For example, the clamping groove 201 in FIG. 6 can be used to clamp a circular workpiece, such as the clamping groove 201 in FIG. It can be used to clamp rectangular workpieces. For example, the clamping part in Figure 8 can be used to clamp plate-shaped workpieces. In specific applications, different clamping parts 2 can be selected according to different workpieces.

The fixture provided by the utility model has strong versatility and can be quickly installed, positioned and locked, and quickly changed molds. In this embodiment, the fixture includes three cylinders to control three lateral expansion blocks 31, and then four sets of ball lock parts 4 are positioned and locked. The external dimensions of the clamping parts 2 can be uniformly set for replacement. The switch controls different cylinders to realize quick and automatic clamping. The ball lock part 4 can be fixed and locked by four steel balls, which is safe and reliable, and the repeat positioning accuracy can reach 0.015mm, which meets the functions of fast positioning and locking, and saves the operator from correcting the fixture and finding the origin of the workpiece. step. Wherein, the bidirectional lateral expansion block 31 can clamp two parts of the same size for processing at the same time, so that the clamp can realize multi-workpiece processing and improve production efficiency. The external dimensions of the clamping part 2 are uniform, which can realize fast switching, so that the speed of product line change can be completed within 1 minute, which greatly improves the production capacity of diversified products and improves the customer's product delivery capacity. It can simultaneously carry out multiple pieces Processing, and the pneumatic device saves manpower and reduces labor intensity.

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements or improvements made within the spirit and principles of the present utility model should be included in the utility model. within the scope of protection.

Claims (12)

1. a fixture, comprise matrix, it is characterized in that, also comprise the detachable hold assembly that is fixedly connected on described matrix, described hold assembly at least comprises the first clamping part and the second clamping part that arrange in opposite directions, is provided with the driver part for driving described the first clamping part and the second clamping part to draw close in opposite directions on described matrix; Described driver part comprise slide or be rotationally connected with described matrix and for driving described the first clamping part or/and the lateral expansion piece that the second clamping part is drawn close in opposite directions, described driver part also comprises the power part for driving described lateral expansion piece.

2. fixture as claimed in claim 1, it is characterized in that, described lateral expansion piece is slidably connected to described matrix, and the direction that the direction that described lateral expansion piece slides is drawn close with the second clamping part in opposite directions with described the first clamping part is vertical, on described lateral expansion piece with described hold assembly side in opposite directions or/and be set to inclined-plane with described lateral expansion piece side in opposite directions on described hold assembly.

3. fixture as claimed in claim 1, is characterized in that, the paired interval of described hold assembly arranges, and described lateral expansion piece is arranged between spaced two hold assemblies.

4. fixture as claimed in claim 3, is characterized in that, described hold assembly is provided with at least two pairs, is provided with the lateral expansion piece described in a group between every pair of described hold assembly.

5. the fixture as described in any one in claim 1 to 4, is characterized in that, between described the first clamping part and the second clamping part, connect by elastic arm, or, between described the first clamping part and the second clamping part, be provided with elastic component.

6. fixture as claimed in claim 5, it is characterized in that, described elastic arm comprises bottom transverse arm and the first longitudinal arm, the second longitudinal arm that arrange in opposite directions, the upper end of described first longitudinal arm is connected in described the first clamping part, the lower end of described first longitudinal arm is connected in one end of described bottom transverse arm, the upper end of described second longitudinal arm is connected in described the second clamping part, and the lower end of described second longitudinal arm is connected in the other end of described bottom transverse arm.

7. the fixture as described in any one in claim 1 to 4, is characterized in that, described the first clamping part and described the second clamping part end face are in opposite directions provided with holding tank, the curved or dihedral of described holding tank.

8. the fixture as described in any one in claim 1 to 4, is characterized in that, is provided with positioning accurate hole or/and fixing and locking hole on described matrix.

9. the fixture as described in any one in claim 1 to 4, it is characterized in that, described matrix is connected with ball lock assembly, described ball lock assembly comprise sidewall be provided with the lock tube of through hole, be threadedly connected to described lock tube threaded connector, be positioned at the driving steel ball of described threaded connector lower end, drive and can protrude the locking steelball of described through hole by described driving steel ball, described locking steelball is arranged at described through hole, and described through hole and described locking steelball are provided with at least two.

10. the fixture as described in any one in claim 1 to 4, it is characterized in that, on described matrix, be provided with locating slot, a side of described the first clamping part or described the second clamping part and the sidewall of described locating slot are affixed, and are connected on described matrix by positioning and locking part.

11. fixtures as described in any one in claim 1 to 4, is characterized in that, are provided with the cushion block of detachable replacing between described lateral expansion piece and described hold assembly.

12. fixtures as described in any one in claim 1 to 4, is characterized in that, described power part is cylinder or hydraulic cylinder, and described power part is built in described matrix.

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